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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Claude
S
Aider
A
GitHub Copilot
B
TaglineAnthropic's flagship — best reasoning + longest useful context.Terminal-based AI pair programmer. Git-aware, model-flexible.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
Categorychatcodingcoding
PricingFree + $20/mo Pro + team/enterpriseFree (open source) + whatever API you useFree (limited) + $10/mo Pro + $19/mo Business
Best forLong writing, code, careful thinking, documents over 50 pages.Developers who want open-source tooling with full control.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
Weaknesses
  • Image generation is weak
  • No native web search on all tiers
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictS-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
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